Recent Additions in the Modeling Capabilities of an Open-Source Wave Energy Converter Design Tool: Preprint
WEC-Sim is a midfidelity numerical tool for modeling wave energy conversion devices. The code uses the MATLAB SimMechanics package to solve multibody dynamics and models wave interactions using hydrodynamic coefficients derived from frequency-domain boundary-element methods. This paper presents the new modeling features introduced in the latest release of WEC-Sim. The first feature discussed conversion of the fluid memory kernel to a state-space form. This enhancement offers a substantial computational benefit after the hydrodynamic body-to-body coefficients are introduced and the number of interactions increases exponentially with each additional body. Additional features include the ability to calculate the wave-excitation forces based on the instantaneous incident wave angle, allowing the device to weathervane, as well as import a user-defined wave elevation time series. A review of the hydrodynamic theory for each feature is provided and the successful implementation is verified using test cases.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- Resource Type:
- Resource Relation:
- Conference: International Offshore and Polar Engineering Conference (ISOPE 2015); Kona, Hawaii; June 21?26, 2015
- Research Org:
- NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
- Sponsoring Org:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
- Country of Publication:
- United States
- 16 TIDAL AND WAVE POWER WAVE ENERGY CONVERTER; OPEN SOURCE; MODELING SOFTWARE; WEC-SIM; MULTIBODY DYNAMICS; NREL
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